Catalytic reactivity of an iridium complex with a proton responsive N-donor ligand in CO hydrogenation to formate.

Catalytic hydrogenation of CO into formic acid/formate is an attractive conversion in the utilization of CO. Although various catalysts with high catalytic efficiency are reported, a very few studies have been carried out to correlate/understand the efficacy and stability of the hydrogenation catalysts, which could be helpful to direct the future design strategy of corresponding catalysts. Herein, a half-sandwich iridium complex containing bibenzimidazole as a proton responsive N-donor ligand, [Cp*Ir(BiBzImH)Cl]Cl, has been synthesized and fully characterized.

Polymer-ionic liquid gels for enhanced gas transport.

Remarkably increased permeabilities for the separation of an important binary gas pair (CO2/N2) by polymer-ionic liquid gel membranes are reported.

The prevalence of colorectal neoplasia in patients with gastric cancer: a Korean Association for the Study of Intestinal Disease (KASID) Study.

Goals: The goal of this study was to determine the prevalence of colorectal neoplasia, using colonoscopy surveillance, in a cohort of patients with gastric cancers.

Background: The association between gastric cancer and colorectal cancer has been conflicting.

Study: A total of 543 patients (males, 362; females, 181) with gastric cancer were matched with 2 persons from the population without a diagnosis of gastric cancer as confirmed by endoscopy according to age (+/-2 y), sex, date of colonoscopy examination (+/-2 wk), and endoscopist.

An adequate level of training for technical competence in screening and diagnostic colonoscopy: a prospective multicenter evaluation of the learning curve.

Background: Various training programs in colonoscopy recommend that trainees should perform at least 100 to 200 procedures to be considered technically competent at diagnostic colonoscopy.

Objective: Our purpose was to determine the adequate level of training for technical competence in screening and diagnostic colonoscopy.

Design: A prospective multicenter trial.

[Genetic polymorphisms of alcohol-metabolizing enzymes and cytokines in patients with alcohol induced pancreatitis and alcoholic liver cirrhosis].

Background/aims: Susceptibility to organ damage induced by alcohol may be related to inherited variations (polymorphisms) in alcohol-metabolizing enzymes, or polymorphisms affecting cytokines. The aim of this study was to compare the genotype and allelic frequencies of ADH2, ADH3, ALDH2, cytochrome P450-2E1, IL-1, IL-6, IL-8 and tumor necrosis factor-alpha in patients with alcoholic pancreatitis and alcoholic liver cirrhosis with those of controls.

Methods: We determined the polymorphism of genes of the above-mentioned alcohol-metabolizing enzymes and cytokines in 29 alcoholic pancreatitis patients (AP), 22 alcoholic liver cirrhosis patients (LC) and 100 healthy blood donors (control).

Malignant gastrointestinal stromal tumor of the ampulla of Vater: a case report.

GIST is a rare neoplasm, the majority of GISTs are located in the stomach and small intestine. Most GISTs are diagnosed histopathologically after resection because of submucosal location. A 37-year-old female patient presented with a 2-weeks history of generalized weakness, nausea accompanied by intermittent passage of black, tarry stools.

[A case of primary leiomyosarcoma of the liver].

Primary hepatic leiomyosarcoma is a very rare malignant tumor of the liver and rather slowly progressing disease. When the tumor is solitary or even multiple but located in one lobe, the treatment of choice is an operation. We report a case of huge leiomyosarcoma in a 58-year old female patient treated by surgical resection.